2221981243 has 8 divisors (see below), whose sum is σ = 2353586112. Its totient is φ = 2090476416.

The previous prime is 2221981211. The next prime is 2221981249. The reversal of 2221981243 is 3421891222.

It is a happy number.

2221981243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2221981243 - 2⁵ = 2221981211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221981199 and 2221981208.

It is not an unprimeable number, because it can be changed into a prime (2221981249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23421 + ... + 70657.

It is an arithmetic number, because the mean of its divisors is an integer number (294198264).

Almost surely, 2^2221981243 is an apocalyptic number.

2221981243 is a deficient number, since it is larger than the sum of its proper divisors (131604869).

2221981243 is a wasteful number, since it uses less digits than its factorization.

2221981243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50021.

The product of its digits is 13824, while the sum is 34.

The square root of 2221981243 is about 47137.8960391743. The cubic root of 2221981243 is about 1304.9087085965.

The spelling of 2221981243 in words is "two billion, two hundred twenty-one million, nine hundred eighty-one thousand, two hundred forty-three".